I recently acquired a used ICOM 7600 that will not receive on any band or on either antenna. Scope just shows what looks like background scatter, no signal. Front panel lights up and everything looks like it is working, just no signal coming in. I've used the same antenna on my 857D and get great signals in, switch it over to the 7600 and no joy. I am new to this radio and am not real familiar with all of the ins and outs. In speaking with another Ham that is well versed in these Icoms, he indicated that he had a similar issue in his 7610 and remedied it by reinstalling the firmware, starting with 2 or 3 versions back and coming forward. Anyone heard of this issue and that particular fix? I guess I will give it a go since I don't think it will harm anything.